Biatoropsis hafellneri

A recent segregate from the lichenicolous basidiomycete Biatoropsis usnearum. Biatoropsis hafellneri forms galls on the Usnea fragilescens aggregate, especially U. cornuta. Like its main host, so far it seems to have a south western distribution. See http://fungi.myspecies.info/all-fungi/biatoropsis-hafellneri for identification.